FASS question

[JEstes]

Thanks! I thought 25 PSI is still pretty good though.



Please forgive me for all of the newbie questions... . I'm still pretty new to the diesel world.

 

[Bodie]

Why not just put a 1/4 turn valve in the return line and close it some to restrict fuel thats trying to get back to the tank, should increase fuel pressure... Hmmm...

Leave it open up most of the time, Normal driving, and turn it close to you get the pressure you want for racing, sledpulling, etc.

Are you serious? That would not work.....

 

[michaelRitz]

Sorry to tell but it has been done, I talked to a fellow that did it but he may have an older FASS without the relief valve in the T-block, and he can control his pressure. I know this pump is pumping plenty of fuel, but guys are saying the modded Cp3 need 40 psi, so by what they are saying I guess I need 40 psi. I will find a solution to my problem at hand with some time. Just dont want to buy a modded Cp3 or dual Cp3s and not be able to supply the pump(s) what it needs.

 

[Smokin Joes 2500]

So..... Now that your all done ranting, what about MY truck (see sig. at top of post) 95 or 150... . I have 50 horse injectors and a Juice with no attitude. Would the increase in pressure on the 95 be hard on my injectors??

 

[LowFly]

Sorry to tell but it has been done, I talked to a fellow that did it but he may have an older FASS without the relief valve in the T-block, and he can control his pressure. I know this pump is pumping plenty of fuel, but guys are saying the modded Cp3 need 40 psi, so by what they are saying I guess I need 40 psi. I will find a solution to my problem at hand with some time. Just dont want to buy a modded Cp3 or dual Cp3s and not be able to supply the pump(s) what it needs.

I have been told by a dealer that is running dual CP3's that he found his best results at 20-25 PSI. He said any higher and his truck would start to rattle. And the dyno runs looked better from what he said.



A variable restriction on the return line will work. . i have told some to use it to adjust their pressure to where they want it (Leave ball and spring installed for a check valve). But you are at the mercy of the high pressre pop off in the t-block if you have the newer style pump. The first FASS's didnt have them. You just want to make sure you have return flow back to the tank... that is the only requirment.

 

[LowFly]

So..... Now that your all done ranting, what about MY truck (see sig. at top of post) 95 or 150... . I have 50 horse injectors and a Juice with no attitude. Would the increase in pressure on the 95 be hard on my injectors??

do you have a 150 GPH or 150 Series? The FASS has absoultly no bearing on what pressure your injectors see. The CP3 controls all Rail Pressure. The FASS's job is to help maintain pressure by giving a good supply of fuel. Supply drops off..... so does rail pressure. You increase head pressure to the CP3... . this should not affect rail pressure. If it does... you need to eye that pressure regulator on the CP3.

 

[DerekW]

I would like to install a FASS system on my truck but I saw a video that showed difference between new and old pump designs. the new one was still too loud for my liking. Do you think it was cuased by to big of a FASS pump installed for his application? Or do the new FASS pumps still make noise noticeable from the outside of the truck. Also I have never installed a FASS system to know how it works so I was wondering what is the difference between running a replacement in tank pump that flowed better suchas a the walbro offered by Glacier Diesel Performance and the FASS system with just the pump? Also I have 451 RWHP currently my goal is 600-700RWHP on my 2004. 5 CR using straight diesel. I am saving up for ATS compound turbo kit right now. What would you suggest in the way of a fuel system. I am dead set on running diesel dynamics injector nozzles what stage should I run? Will I need the modded CP3 for my minimum requirement of 600 RWHP? Which FASS system flow rating should I run for this HP range?

 

[LowFly]

I would like to install a FASS system on my truck but I saw a video that showed difference between new and old pump designs. the new one was still too loud for my liking. Do you think it was cuased by to big of a FASS pump installed for his application? Or do the new FASS pumps still make noise noticeable from the outside of the truck. Also I have never installed a FASS system to know how it works so I was wondering what is the difference between running a replacement in tank pump that flowed better suchas a the walbro offered by Glacier Diesel Performance and the FASS system with just the pump? Also I have 451 RWHP currently my goal is 600-700RWHP on my 2004. 5 CR using straight diesel. I am saving up for ATS compound turbo kit right now. What would you suggest in the way of a fuel system. I am dead set on running diesel dynamics injector nozzles what stage should I run? Will I need the modded CP3 for my minimum requirement of 600 RWHP? Which FASS system flow rating should I run for this HP range?

Those vids were of HPFP's. Those are a touch louder due to the bracket they use to mount to the bed. The FASS’s mount to the frame. AND Bodie mounted them IN the bed instead of under. SO it will resonate more than if it was under the bed. While the vids were a good example of the noise difference... they were not a good example of a text book install as per our instructions. There is also a vid of the 95 GPH HPFP that is the best as far as noise goes.



If you need a modded CP3 or not…. . i can not tell you that. BUT if you want to have a pump that can push 45 PSI, I would suggest the 95 GPH unit if you are running moderate sticks. Then you got the 90GPH @45 PSI or 180GPH @ 45 PSI if you are going to get carried away with power. If you are going to double stack stock CP3’s, run the 150 GPH at stock pressure. Or slightly above…. . from what I have been told….



Here is that vid of the 95 GPH HPFP... .

 

[Smokin Joes 2500]

do you have a 150 GPH or 150 Series? The FASS has absoultly no bearing on what pressure your injectors see. The CP3 controls all Rail Pressure. The FASS's job is to help maintain pressure by giving a good supply of fuel. Supply drops off..... so does rail pressure. You increase head pressure to the CP3... . this should not affect rail pressure. If it does... you need to eye that pressure regulator on the CP3.

Finally someone wants to help..... I dont have an FASS as of now thats why Im inquiring. Dont want to go too small or too big. Already broke 2 injectors so just making sure about the pressure thing. After I had to pay to get the injectors fixed I cringe every time I hear the word pressure. So do you think I need a 95 gph or a 150gph??

 

[LowFly]

If you need a modded CP3 or not…. . i can not tell you that. BUT if you want to have a pump that can push 45 PSI, I would suggest the 95 GPH unit if you are running moderate sticks. Then you got the 90GPH @45 PSI or 180GPH @ 45 PSI if you are going to get carried away with power. If you are going to double stack stock CP3’s, run the 150 GPH at stock pressure. Or slightly above…. . from what I have been told….

The 95 GPH can run higher pressure down the road..... if you are not going to get crazy with power..... i say that is all you would need.

 

[DerekW]

Already broke 2 injectors so just making sure about the pressure thing. After I had to pay to get the injectors fixed I cringe every time I hear the word pressure. QUOTE]





What cause the injectors to break? where they aftermarket where as you sent in your old ones for a core or modified stock nozzles. What brand and what flow rating? How much did that cost you tow bill and all?

 

[Smokin Joes 2500]

Is this something that is a real necessity on our trucks.



Does the FASS bypass the stock filter?



Does it hook into the factory lines or do I have to run a new line?



Do I take the factory lift pump out if so?



Is it worth the money, will it increase power any or just aid in making more power later?



Where do you get replacement filters and how often should you change them??



Does it come with good instructions and all the hardware I need?



Would it "HURT" to run the 150gph or should I deffinatly run the 95gph?



Im really struggling with if I really need this at my power level or would the money be better spent elswhere?

 

[Smokin Joes 2500]

What cause the injectors to break? where they aftermarket where as you sent in your old ones for a core or modified stock nozzles. What brand and what flow rating? How much did that cost you tow bill and all?[/QUOTE]



Broke 2 stockers dont know what caused it but I threw my Edge EZ box in the trash And havent had any problems since. The shop owner gave me one of his personal injector bodies ordered 1 from cummins and installed 50 horse EDM'd tips that he bought from a shop he buys all his performance injectors from... . dont know who just know that the shop that did my work has a decent reputation and they are ADS certified. Plus he put on 6 new injector feed lines & ran my valves (obviously). Total bill was like $1700 some odd dollars- no tow bill I drove it there its only like 10 minutes from my house.

 

[LowFly]

Is this something that is a real necessity on our trucks?

If you plain on some large fuleling boxes, then yes. A larger after market fuel pump is needed. Even if you truck is stock, the stock lift pump leave a lot to be desired.

Does the FASS bypass the stock filter?

The FASS does, the HPFP does not. BUT you can run the stock filter if you want to.

Does it hook into the factory lines or do I have to run a new line?

FASS replaces everything from the Tank to the CP3/VP44. We give 3/8" line to run with all the fittings needed. Return lines are left alone though. We have install instructions on our site to see what is involved.

Do I take the factory lift pump out if so?

FASS, Yes and NO. You leave it on the back of the filter head if its a 03-04. 5. If its a 98. 5-02, its your choice. You can leave it or take it out. 05+ trucks you leave in the tank and just bypass around it.

Is it worth the money, will it increase power any or just aid in making more power later?

We don't make any power per se. We restore lost power due to fuel being airated by driving. Also the 150 series FASS will aid in protecting your injectors with a 3 micron filter and the removal of the air. ALSO the added flow the FASS adds will support pretty much anything you can toss at it fueling wise.

Where do you get replacement filters and how often should you change them??

You can get them from your FASS dealer or a local store if it’s the 150 Series unit. If its the 95 Series unit, your FASS dealer will be the only place you can get fuel filters. BUT i have been told that the water separator for the 95 series can be found at outside sources. We recommend about a 50,000 mile life on the filters. The water separator can go even longer. You just clean it out with some gas or alcohol…. i would say a 4:1 ratio. 2 fuel filters changes to 1 water separator change.

Does it come with good instructions and all the hardware I need?

Check this out.....

Would it "HURT" to run the 150gph or should I deffinatly run the 95gph?

Wont "hurt" to run the 150 GPH on a stock truck. You may have in-tank issues with restriction... . but this is rare. 05+ come with a suction tube kit so you dont have to worry about that on those trucks. You just have to see where you are going to go with your build up and choose what system fits you best. If you go back and read some of my postes before, i covered what kit is better for what build.

Im really struggling with if I really need this at my power level or would the money be better spent elswhere?

I honestly feel that you money would be well spent. I have had my system going on 3 years now. (I have worked here for just under one year) I have never had an issue and it made my truck idle quieter. Throttle response was improved a bit as well. Nothing to jump up and slap your grandma about... but it was a subtle difference.

 

[Smokin Joes 2500]

Thanks Diesel Dan, I'll be pondering this info now and then make my decission